Thyroxine (T4), Free, Direct
Non-returnable
Thyroxine (T4), Free, Direct
- Preparation InstructionsIf you’re taking a supplement containing biotin (also called vitamin B7 or B8, vitamin H, or coenzyme R), commonly found in products promoting nail, skin and hair health, it is recommended that you wait at least 72 hours from your last dose before sample collection.
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Product Details
It is estimated that 20 million Americans suffer from some form of thyroid disease. Testing should not be performed during or soon after the administration of Heparin, an anticoagulant.
